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|
// Tomll is a linter for TOML
//
// Usage:
// cat file.toml | tomll > file_linted.toml
// tomll file1.toml file2.toml # lint the two files in place
package main
import (
"flag"
"fmt"
"io"
"io/ioutil"
"os"
"github.com/pelletier/go-toml"
)
func main() {
flag.Usage = func() {
fmt.Fprintln(os.Stderr, `tomll can be used in two ways:
Writing to STDIN and reading from STDOUT:
cat file.toml | tomll > file.toml
Reading and updating a list of files:
tomll a.toml b.toml c.toml
When given a list of files, tomll will modify all files in place without asking.
`)
}
flag.Parse()
// read from stdin and print to stdout
if flag.NArg() == 0 {
s, err := lintReader(os.Stdin)
if err != nil {
io.WriteString(os.Stderr, err.Error())
os.Exit(-1)
}
io.WriteString(os.Stdout, s)
} else {
// otherwise modify a list of files
for _, filename := range flag.Args() {
s, err := lintFile(filename)
if err != nil {
io.WriteString(os.Stderr, err.Error())
os.Exit(-1)
}
ioutil.WriteFile(filename, []byte(s), 0644)
}
}
}
func lintFile(filename string) (string, error) {
tree, err := toml.LoadFile(filename)
if err != nil {
return "", err
}
return tree.String(), nil
}
func lintReader(r io.Reader) (string, error) {
tree, err := toml.LoadReader(r)
if err != nil {
return "", err
}
return tree.String(), nil
}
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